[[java-aggs-metrics-percentile]]
==== Percentile Aggregation

Here is how you can use
{ref}/search-aggregations-metrics-percentile-aggregation.html[Percentile Aggregation]
with Java API.


===== Prepare aggregation request

Here is an example on how to create the aggregation request:

[source,java]
--------------------------------------------------
MetricsAggregationBuilder aggregation =
        AggregationBuilders
                .percentiles("agg")
                .field("height");
--------------------------------------------------

You can provide your own percentiles instead of using defaults:

[source,java]
--------------------------------------------------
MetricsAggregationBuilder aggregation =
        AggregationBuilders
                .percentiles("agg")
                .field("height")
                .percentiles(1.0, 5.0, 10.0, 20.0, 30.0, 75.0, 95.0, 99.0);
--------------------------------------------------

===== Use aggregation response

Import Aggregation definition classes:

[source,java]
--------------------------------------------------
import org.elasticsearch.search.aggregations.metrics.percentiles.Percentile;
import org.elasticsearch.search.aggregations.metrics.percentiles.Percentiles;
--------------------------------------------------

[source,java]
--------------------------------------------------
// sr is here your SearchResponse object
Percentiles agg = sr.getAggregations().get("agg");
// For each entry
for (Percentile entry : agg) {
    double percent = entry.getPercent();    // Percent
    double value = entry.getValue();        // Value

    logger.info("percent [{}], value [{}]", percent, value);
}
--------------------------------------------------


This will basically produce for the first example:

[source,text]
--------------------------------------------------
percent [1.0], value [0.814338896154595]
percent [5.0], value [0.8761912455821302]
percent [25.0], value [1.173346540141847]
percent [50.0], value [1.5432023318692198]
percent [75.0], value [1.923915462033674]
percent [95.0], value [2.2273644908535335]
percent [99.0], value [2.284989339108279]
--------------------------------------------------